docs: def get_platform():
      """Return the current OS platform.
  
      For example: if current os platform is Ubuntu then a string "ubuntu"
      will be returned (which is the name of the module).
      This string is used to decide which platform module should be imported.
      """
      # linux_distribution is deprecated and will be removed in Python 3.7
      # Warings *not* disabled, as we certainly need to fix this.
      tuple_platform = platform.linux_distribution()
      current_platform = tuple_platform[0]
      if "Ubuntu" in current_platform:
          return "ubuntu"
      elif "CentOS" in current_platform:
          return "centos"
      elif "debian" in current_platform:
          # Stock Python does not detect Ubuntu and instead returns debian.
          # Or at least it does in some build environments like Travis CI
          return "ubuntu"
      else:
          raise RuntimeError("This module is not supported on {}."
                             .format(current_platform))